||2000|2001|2002|2003|2004|2005|2006|2007|2008|2009|2010|2011|2012|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Hydro power|1,150|1,161|1,171|1,247|1,281|1,293|1,316|1,326|1,357|1,379|1,382|1,401|1,584|
|Thermal|685|835|1,056|1,233|1,215|1,155|1,155|1,155|1,285|1,290|1,390|1,690|1,638|
|Other renewables|3|3|3|3|3|3|3|3|3|15|45|50|90|
|Total availability|1,838|1,999|2,230|2,483|2,499|2,411|2,434|2,444|2,645|2,684|2,818|3,141|3,312|
|Hydro power|3,197|3,110|2,962|3,310|2,960|3,451|4,634|3,947|4,130|3,881|5,634|4,622|3,292|
|Thermal|3,485|3,407|3,201|4,298|5,080|5,314|4,751|5,864|5,763|5,975|4,995|6,785|8,339|
|Other renewables|3|3|4|3|3|5|4|4|8|27|86|121|169|
|Total production|6,685|6,520|6,167|7,611|8,043|8,770|9,389|9,815|9,901|9,883|10,715|11,528|11,800|

Question: tell me the number of years that hydro power had an annual generation over 4,000.
Answer: 4